CurtPalme.com Home Theater Forum

ronaldus · Joined: 25 Dec 2010 Posts: 183 Location: france

Hi everybody,

I can hardly move the focus of one of my HD-10GT17 lenses anymore. It's the adjustment of the main focus (knob closest to the tube). The edge focus works smoothly. I had to put so much force on the knob in order to move the focus that it came off (but I can still screw it back in). Can I open the lens up without any problem and put in some grease or would it then be hard to put it together again?

Does anybody had the same problem?

Regards,

Ron.

Tim in Phoenix · Joined: 21 Oct 2006 Posts: 4409 Location: Phoenix

Hello

Sure, open it up. You may have some grit that got in there. Clean it out, maybe get some extra fine sandpaper and take a little metal off of the barrel, a thousandth of an inch.

.

ronaldus · Joined: 25 Dec 2010 Posts: 183 Location: france

Hi,

Thanks Tim,

I'll try to do that.

regards,

Ron.

Tom.W · Joined: 09 Mar 2006 Posts: 6635

The only thing you want to take apart is the outer shell. Remove the two pins the knobs screw onto. Their square on top so you can carefully use a pair of pliers.

digitalayon · Joined: 02 Mar 2009 Posts: 921

pics of this procedure would be helpful...if you can, snap some as you go

ronaldus · Joined: 25 Dec 2010 Posts: 183 Location: france

I've made pictures but they will come tomorrow. it didn't work by the way. I can still hardly move the center focus. I wander if the previous owner didn't drop the lens and that it's slightly oval now. I don't want to grind to much because then the nice black finnish will be gone. I've used 600 waterproof sanding paper.

regards,

Ron.

Tim in Phoenix · Joined: 21 Oct 2006 Posts: 4409 Location: Phoenix

Hello

Someone here may have one GT17 to spare, post a WTB in the buy/sell section.

.

barclay66 · Posted: Wed Aug 01, 2012 7:34 pm Post subject:

Hi,

A good set of HD10-GT17 is currently listed on the german eB*y. As far as I can see the seller is a forum member too...

Regards,
barclay66

dvh99 · Joined: 25 Dec 2009 Posts: 2158 Location: nederland

??

how can you see if the seller is a forum member.

link please, i might take them from him if reasonably priced.

barclay66 · Posted: Thu Aug 02, 2012 8:08 am Post subject:

**Curt Palme** · Posted: Thu Aug 02, 2012 12:23 pm Post subject:

I have had lenses seize up that don't recover, but a tiny bit of silicone grease or similar (automotive grease works as well) does help a lot.

ronaldus · Joined: 25 Dec 2010 Posts: 183 Location: france

Hi Curt,

I've put in some grease (vaseline) But it doesn't help much. I can move the lens by moving the corner focus ring to it's end and then the center focus will turn aswell. Maybe I'll give it another try.

As promised some pictures.

Maybe the grease I've used is not so good